File in Section: - Bulletin No.: 16-NA-149 Service Bulletin Date: August, 2016 INFORMATION

Subject: 2016 Buick Envision New Model Features

Model Year: VIN: Brand: Model: Engine: Transmission: From: To: From: To: GASOLINE, 4 CYL, L4, 2.0L, Hydra-Matic DI, DOHC, VVT, ™ 6T50 6-Speed DCVCP, Buick Envision 2016 2016 All All Automatic TURBO — Transaxle RPO LTG with — RPO M2D STOP/START — RPO KL9

Region — Countries United States and Canada

Overview

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Bulletin Purpose 4421124 This is a special bulletin to introduce the 2016 Buick Envision. The purpose of this bulletin is to help the Service Department Personnel become familiar with some of the vehicle’s new features and to describe some of the action they will need to take to service this vehicle.

Copyright 2016 General Motors LLC. All Rights Reserved. Page 2 August, 2016 Bulletin No.: 16-NA-149

About the Car • Passive entry and push-button start with standard The Buick Envision was designed, engineered and remote start. tested in the United States and is a world-class luxury • Programmable power liftgate with hands-free crossover vehicle. It targets customers shopping operation. between the Encore, the best-selling Buick in eight years, and the Enclave. It is a four door, five passenger compact crossover with steel body frame (unibody) with front and rear crumple zones; galvanized steel front fenders, roof, door panels and one piece body side outer panel. Efficiency enhancing features include electric power steering, upper grille shutters that open and close to enhance aerodynamics on the highway and a body structure incorporating mass reducing high-strength and ultra-high-strength steels and a lightweight aluminum hood. The Envision is equipped with a 2.0L turbocharged engine with Stop/Start technology and produces 252 horsepower (188 kW), matched with Buick’s first crossover vehicle application of HiPer Strut front suspension with a Hydra-Matic™ 6T50 6-speed automatic transaxle and Buick’s first Active Twin Clutch all-wheel-drive (AWD) system. Vehicle Highlights Some of the vehicle highlights are: • Active noise cancellation. • Available Adaptive Cruise Control. 4421553 • Available Automatic Parking Assist. • Sliding 60/40 split rear seat offering more legroom • Available cooled front seats. for the second row passengers. • Available Front Automatic Braking. • When folded the second row seat offers a flat load floor. • Available Head-Up Display (HUD). Standard 8-way power-adjustable front seats and • Available OnStar® with 4G LTE and built-in Wi-Fi • hotspot. four-way-adjustable lumbar, including available adjustable thigh support on some models that enhances comfort for taller passengers. • Standard 19-inch aluminum wheels. • Standard Bose® premium sound system. • Standard heated front seats, heated rear outboard seats and heated steering wheel. • Standard Safety Alert Seat and Lane Keep Assist, as well as available Automatic Park Assist, and Surround Vision 360-degree camera system. • Standard tri-zone climate control with rear-seat controls and console-mounted rear vents. • QuietTuning® technologies. Airbag System

Airbag Readiness Light This light shows if there is an electrical problem with the airbag system. The system check includes the airbag sensors, passenger sensing system, the pretensioners, 4421614 the airbag modules, the wiring, and the crash sensing and diagnostic module (SDM). The airbag readiness • Available panoramic moonroof. light turns ON for several seconds when the vehicle is • Available Surround Vision. Provides the driver started. If the light does not turn ON, have it repaired with a view of the scene around the vehicle on the immediately. centerstack display. All vehicle airbags have the word AIRBAG on the trim • Buick IntelliLink® with 8-inch (203 mm) diagonal or on a label near the deployment opening. The airbags color touch screen. are located in the following positions: • LED daytime running lamps and rear LED accent – A frontal airbag for the driver. lights. – A frontal airbag for the front outboard passenger. Bulletin No.: 16-NA-149 August, 2016 Page 3

– A knee airbag for the driver. activates only during a brake apply under low – A knee airbag for the front outboard passenger. vacuum conditions. In this case the electronic brake control module will actively increase and – Seat-mounted side impact airbag for the driver. control the hydraulic brake pressure by turning the – Seat-mounted side impact airbag for the front pump motor ON and the appropriate solenoid outboard passenger. valves ON and OFF. When hydraulic brake boost – Seat-mounted side impact airbags for the second is active, a series of rapid pulsations is felt in the row outboard passengers. brake pedal. – A roof-rail airbag for the driver and the passenger • Electronic Stability Control: Electronic stability seated directly behind the driver. control provides added stability during aggressive – A roof-rail airbag for the front outboard passenger maneuvers. Yaw rate is the rate of rotation about and the passenger seated directly behind the front the vehicle's vertical axis. The stability control is outboard passenger. activated when the electronic brake control module determines that the desired yaw rate does Brakes not match the actual yaw rate as measured by the yaw rate sensor. The difference between the desired yaw rate and the actual yaw rate is the This vehicle is equipped with a Continental Teves yaw rate error, which is a measurement of over Mk100 ABS, traction control, electronic stability control steer or under steer. When a yaw rate error is and a hydraulic brake system with diagonal brake detected, the electronic brake control module circuit split. The electronic brake control module attempts to correct the vehicle's yaw motion by (EBCM) and the brake pressure modulator is serviced applying brake pressure to one or more of the separately. The brake pressure modulator uses a four wheels. The amount of brake pressure which is circuit configuration to control hydraulic pressure to applied varies, depending on the correction each wheel independently. required. • Antilock Brake System (ABS): When wheel slip • Traction Control: When drive wheel slip is noted, is detected during a brake application, an ABS the EBCM will enter traction control mode. First, event occurs. During ABS braking, hydraulic the EBCM requests the engine control module pressure in the individual wheel circuits is (ECM) to reduce the amount of torque to the drive controlled to prevent any wheel from slipping. A wheels via a serial data message. The ECM separate hydraulic line and specific solenoid reduces torque to the drive wheels and reports the valves are provided for each wheel. The ABS can amount of delivered torque. If the engine torque decrease, hold, or increase hydraulic pressure to reduction does not reduce drive wheel slip, the each wheel. The ABS does not, however, increase EBCM will actively apply the brakes on the hydraulic pressure above the amount which is slipping drive wheel. During traction control transmitted by the master cylinder during braking. braking, hydraulic pressure in each drive wheel • Hydraulic Brake Assist: The hydraulic brake circuit is controlled to prevent the drive wheels assist function is designed to support the driver in from slipping. The EBCM commands the pump emergency braking situations. The EBCM motor and appropriate solenoid valves ON and receives inputs from the brake pressure sensor. OFF to apply brake pressure to the slipping wheel. When the EBCM senses an emergency braking • Hill Hold Start Assist: The hill hold start assist situation, it will actively increase the hydraulic allows the driver to launch the vehicle without a brake pressure to a specific maximum by turning roll back while moving the foot from the brake the pump motor ON. pedal to the accelerator pedal. The EBCM • Intelligent Brake Assist: The intelligent brake calculates the brake pressure, which is needed to assist function is designed to provide limited hold the vehicle on an incline and locks that braking to help prevent front and rear low speed pressure for a certain time by commanding the collisions. The EBCM receives inputs from the appropriate solenoid valves ON and OFF when brake pedal position sensor, wheel speed the brake pedal is released. Hill hold start assist is sensors, short range radar and ultrasonic sensors activated when the EBCM determines that the to detect a collision. When the EBCM senses a driver wishes to move the vehicle up-hill, either possible collision, it will actively increase the backwards or forwards. hydraulic brake pressure to apply the brakes. • Optimized Hydraulic Brake System: With the 2.0L engine, the EBCM monitors the vacuum in the brake booster with a vacuum sensor and controls a brake booster vacuum pump depending on vacuum sensor input. It also has a hydraulic brake boost feature which supplements the brake system to maintain consistent brake performance under conditions of low brake booster vacuum. Low brake booster vacuum conditions can include initial start up after the vehicle has been parked for several hours, very frequent brake stops, or high altitude driving. The hydraulic brake boost system Page 4 August, 2016 Bulletin No.: 16-NA-149

Engine Engine Components Description and Operation

• Engine Block: The sand-cast aluminum 319T7 cylinder block is a superior refinement of previous Ecotec engine block castings. It is dimensionally similar with previous Ecotec turbo block variants, while providing improved structural support, as well as enabling greater control of noise, vibration and harshness. The main bearing bulkheads, which support the crank bearings, as well as the cylinder bore walls have been significantly strengthened to support increased engine loads. Refinements to the oil distribution system enable improved oil flow throughout the engine and an expansion of the coolant jacket, along with the use of cast-in-place bore liners, allows more precise bore roundness and improves the block’s ability to dissipate heat. • Rotating Assembly: The crankshaft is made of drop forged steel with induction heat-treated fillets and cross-drilled chamfered oil passages for racing grade lubrication characteristics. Forged powdered metal connecting rods incorporate a 4423531 larger, forged I-beam cross section for added strength in this turbocharged application. The pistons in the 2.0L turbo are lightweight cast Shown is a typical view of a 2.0L Turbocharged Engine aluminum, which reduces reciprocating mass — RPO LTG inside the engine. This enhances efficiency and Overview the feeling of performance as the rpm increases. The tops of the pistons have a dish shape that Performance from GM’s Ecotec family of engines deflects injected fuel. Each piston has its own continues to advance with the 2.0L Turbo — RPO LTG, directed jet that sprays oil toward its skirt, coating which is based on a generation of large displacement its underside and the cylinder wall with an four cylinder engines which are designed for greater additional layer of lubricant. The extra lubrication efficiency. The turbocharger generates up to 20 pounds cools the pistons, reduces both friction and (138 kPa) of boost and its twin-scroll design helps operational noise and bolsters engine durability. optimize the usable power from the engine, virtually • Rotocast Aluminum Cylinder Head with eliminating turbo lag and helping deliver a broad power Sodium Filled Exhaust Valves: The Ecotec 2.0L band. It also gives the engine the rapid throttle turbo's A356T6 aluminum cylinder head is cast responsiveness associated with a higher displacement using a Rotocast process for high strength, naturally aspirated high performance engine. reduced machining and improved port flow. The Electronically controlled turbocharger supporting head is also designed specifically for direct components including the wastegate and bypass valve, injection. The 2.0L turbo head has unique injector help optimize performance and efficiency. mounting locations below the ports. Apart from injector installation, the head has conventional port and combustion chamber designs, both are optimized for direct injection and high boost pressure. The head uses stainless steel intake valves that are nitrided for improved durability and undercut to improve flow and reduce weight. The exhaust valves have sodium-filled stems that promote valve cooling. At normal engine operating temperatures, the sodium inside the valve stem fuses and becomes liquid. The liquid sodium improves conductivity, promoting heat transfer away from the valve face and valve guide to the cooler end of the stem, where it more readily dissipates. This helps maintain a lower, more uniform valve temperature, reducing wear on the valve guide for better alignment and a consistent seal between the valve seat and valve face over the life of the engine. The exhaust manifold is mounted to the cylinder head and is made of cast stainless steel. It is extremely durable and delivers exceptional airflow qualities. Bulletin No.: 16-NA-149 August, 2016 Page 5

• DOHC with Continuously Variable Valve maintain optimum oil temperatures. It has a heat Timing: Overhead cams are the most direct, exchanger incorporated into the oil filter housing. efficient means of operating the valves, while four Coolant to the heat exchanger is provided by the valves per cylinder increase airflow in and out of engine’s coolant circuit. The design optimizes oil the engine. This arrangement is integrated on the cooling with a minimal pressure loss. During the lightweight aluminum cylinder head. Continuously cold starting, the system also enables faster variable valve timing optimizes the engine's heating of the engine oil for an earlier reduction of turbocharging system by adjusting valve timing at internal engine friction. lower rpm for improved turbo response and • Twin-Scroll Turbocharger: An advanced, greater torque delivery. Both the intake and electronically controlled turbocharger with a exhaust cams have hydraulically operated unique twin-scroll design is used to increase vane-type phasers that are managed by a power in the engine. Each of two scrolls on the solenoid and directed by the engine control turbine is fed by a separate exhaust passage, one module (ECM). The phasers turn the camshaft from cylinders one and four, the other from relative to the drive sprocket, allowing intake and cylinders two and three and virtually eliminates exhaust valve timing to be adjusted independently. turbo lag at low engine speeds, giving the engine Cam phasing changes the timing of valve immediate throttle response associated with a operation as conditions such as rpm and engine naturally aspirated high-performance engine. The load vary. This provides an outstanding balance of turbocharger generates maximum boost of about smooth torque delivery over a broad rpm range, 20 psi (138 kPa). Because direct injection cools high specific output and improves fuel the intake process it allows the Ecotec 2.0L turbo consumption. to safely operate at higher boost and a relatively • Direct Injection: Direct injection moves the point higher compression (9.5:1) than a conventional where fuel feeds into an engine closer to the point turbo engine, increasing both output and where it ignites, enabling greater combustion efficiency. efficiency. It fosters a more complete burn of the • Turbocharger - Air-to-Air Intercooler: An intake fuel in the air-fuel mixture, and operates at a lower charge air cooler enhances the power increasing temperature than conventional port injection. This benefits of the turbocharging system. The allows the mixture to be leaner (less fuel and more air-to-air intercooler draws fresh air through a heat air), so less fuel is required to produce the exchanger, much like a radiator, to reduce the equivalent horsepower of a conventional, temperature of compressed air that’s forced port-injection fuel system. Direct injection also through the intake system by the turbocharger. delivers reduced emissions, particularly cold-start Inlet temperature is reduced by as much as 212°F emissions, by about 25 percent. The higher (118°C). Cooler air is denser, which means more compression ratio with direct injection is possible oxygen is packed in the cylinders for optimal because of a cooling effect as the injected fuel combustion and consequently greater power. vaporizes in the combustion chamber, which reduces the charge temperature to lessen the • Cam-Driven Vacuum Pump: A cam-driven likelihood of spark knock. The direct injection fuel vacuum pump ensures the availability of vacuum injectors have been developed to withstand the under all conditions, especially under boost, when greater heat and pressure inside the combustion the engine produces the opposite of vacuum. The chamber, and feature multiple outlets for best pump is mounted at the rear of the cylinder head injection control. and is driven by the exhaust camshaft via a flexible coupling. • Cam-Driven High Pressure Fuel Pump: A high pressure, cam-driven fuel pump provides the Engine Specifications higher fuel pressure required by the direct injection system. The engine mounted fuel pump Displacement: 2.0 L (1998 cc) (122 cubic is augmented by a conventional electrically • — inches) operated supply pump in the fuel tank. The fuel delivery system features a high-pressure stainless • Bore x Stroke: 86 mm (3.39 inches) x 86 mm steel feed line and a pressure regulated fuel rail (3.39 inches) without a conventional fuel return line from the • Compression Ratio: 9.5:1 engine to the tank. Fuel pressure varies from • Horsepower: 252 horsepower (188 kW) @ about 750 psi (5,171 kPa) at idle to 2,250 psi 5,500 rpm — (Estimate) (15,513 kPa) at wide open throttle. • Torque: 260 lb ft (353 Nm) @ 2000 rpm — SAE • Two Stage Variable Displacement Oil Pump: Certified The variable flow oiling system helps maximize fuel efficiency. Rather than the linear operation of • Maximum Engine Speed: 7,000 rpm a conventional fixed flow pump, it is accomplished • Valves: There are 2 intake and 2 exhaust valves with a crankshaft driven oil pump that matches the per cylinder oil supply to the engine load. The engine’s • Valve Lifters: Hydraulic roller finger follower variable flow pump changes its capacity based on the engine’s demand for oil. This prevents using energy to pump oil that is not required for proper engine operation. An engine oil cooler helps Page 6 August, 2016 Bulletin No.: 16-NA-149

• Recommended Fuel: Premium unleaded AutoStop Inhibiting Conditions • Emissions controls: Evaporative system, In order to ensure neither the needs of the driver or the Catalytic converters (close coupled and vehicle are compromised, the engine will not underfloor) and Positive Crankcase AutoStop if the following conditions are met: Ventilation (PCV) • The ambient (outside) temperature and the engine coolant temperature (ECT) correlation do not meet Engine — Stop/Start System — the specified values. RPO KL9 • The ambient temperature is colder than 14°F (−10°C). Stop/Start System Overview • The battery temperature is colder than 32°F (0°C) or warmer than 131°F (55°C). • The HVAC system demand is high. • The HVAC system has been set to Defrost. • The 12V battery state of charge is low. • The Battery Sensor Module Learn procedure has not been completed. Refer to Battery Sensor Module Learn in SI. • Driver seat belt is not fastened and the driver door is not fully closed. (Not applicable to vehicles in North America). AutoStop Enabling Conditions The engine will AutoStop if ALL of the following conditions are met: • The initial minimum vehicle speed during the drive cycle must be 12 mph (19 km/h) or more. Subsequent AutoStop minimum speed may vary from 1 to 6 mph (2 to 10 km/h), depending on the vehicle. • The ambient temperature and the ECT correlation 4563996 meets the specified values. Notice: The Stop/Start System is automatically • The ambient temperature and transmission fluid activated each time the ignition is turned ON. temperature (TFT) correlation meets the specified A fuel-saving Stop/Start system has been integrated values. with the 2.0L engine. When driving and bringing the • Hood Position is CLOSED. Hood Position vehicle to a complete stop and firmly applying the brake CLOSED is a viewable scan tool parameter. pedal, the Stop/Start system may turn the engine OFF, • The brake pedal is depressed more than a depending on operating conditions. When the Stop/ specified value, which is approximately 27%. Start system turns the engine OFF, the tachometer needle will point at AUTO STOP (2) indicating the • The accelerator pedal is in the learned minimum engine has been shut down by the Stop/Start System. throttle position. Once the engine is restarted, the tachometer will • Brake booster vacuum is more than 7 psi (45 kPa). function normally. • The transmission range selector is in D (Drive). Upon releasing the brake pedal or applying the • Vehicle speed is less than 3 mph (5 km/h). accelerator pedal, the engine will restart. After parking Engine speed is less than 1,500 rpm. the vehicle and turning the engine OFF, the tachometer • will read OFF (1). • The ECT is less than 248°F (120°C). An upgraded starter motor and advanced battery • The HVAC system does not receive any A/C technology support the increased number of engine compressor requests. (No A/C or Defrost mode starts. The starter motor has a high performance requests). electric motor and stronger pinion engagement • The battery voltage is more than 12V. mechanism. The starter motor has also been • The battery state of charge is more than 75%. This re-designed to reduce the noise on startup. Advanced varies with state of health. battery technology ensures it can handle frequent charge and discharge cycles. An intelligent battery sensor module monitors the state of charge and health of the battery. Battery state of charge and health are used by the ECM to determine if the Stop/Start function may be performed. It only takes the Stop/Start system around 0.3 seconds to start the engine. Bulletin No.: 16-NA-149 August, 2016 Page 7

AutoStart Enabling Conditions The engine will AutoStart if the following conditions are met: • Driver removes pressure from the brake pedal or depresses the accelerator pedal while the vehicle is in D (Drive). • Hood Position changes to OPENED. Hood Position CLOSED, AJAR or OPENED is a viewable scan tool parameter. • The battery state of charge is less than 73%. This varies with state of health. • The battery voltage is less than 11V. • An A/C compressor request from the HVAC system. (A/C or Defrost mode request). • The vehicle speed increases. • Brake booster vacuum is less than 6 psi (40 kPa). • The ECT is warmer than 257°F (125°C). • The HVAC system Economy mode has been turned OFF by the driver. 3511747 Notice: If the AutoStart crank time exceeds Ask for and use engine oils that meet the dexos® 2 seconds a manual ignition switch restart will be specification. Engine oils that have been approved by necessary. GM as meeting the dexos® specification are marked • The AutoStop time has exceeded 2 minutes. with either of the dexos1® approved logos that are • Driver door is opened and the driver seat belt is shown. For additional information, visit this General unbuckled. (Not applicable to vehicles in North Motors website: http://www.gmdexos.com America). Viscosity Grade Engine Oil — dexos® Use ACDelco dexos1® synthetic blend SAE 5W-30 viscosity grade engine oil. In an area of extreme cold, where the temperature falls below −20°F (−29°C) use SAE 0W-30 engine oil. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. Engine Oil Life System The vehicle features GM’s engine oil life system, which better protects engines by recommending oil changes based on a computer software algorithm using actual engine operating conditions and can save the vehicle owner money by avoiding unnecessary oil changes. Head-Up Display

If equipped with Head-Up Display (HUD), some information concerning the operation of the vehicle is projected onto the windshield. The image is projected through the HUD lens on top of the instrument panel. The information appears as an image focused out toward the front of the vehicle. The HUD may display some of the following vehicle 3512027 information and vehicle messages or alerts: – Speed – Tachometer – Audio – Phone – Navigation – Collision Alert – Cruise Control Page 8 August, 2016 Bulletin No.: 16-NA-149

– Lane Departure OnStar® with 4G LTE and Wi-Fi – Low Fuel IntelliLink® With OnStar® 4G LTE and Wi-Fi®, up to seven devices (smartphones, tablets and laptops) can be connected to high-speed Internet through the vehicle’s built-in Wi-Fi hotspot. To retrieve the SSID and password for the hotspot, press the OnStar® Voice Command button on the overhead console or rearview mirror, wait for the prompt, and then say “Wi-Fi settings.” The information will be displayed on the screen. The powerful OnStar® connection also enables improved access to existing OnStar® safety and security services, including the ability to transmit voice and data simultaneously. That means OnStar® advisors can run a diagnostic check without ever leaving the call, making customer interactions quicker and more seamless. It’s the most comprehensive in-vehicle safety and connectivity system available. For assistance, press the blue OnStar® button or call 1-888-4-ONSTAR (1-888-466-7827).

4427970 The Envision comes standard with Buick IntelliLink® with an 8-inch (203 mm) diagonal color-touch radio that keeps customers connected to the important things in life with the latest system enhancements and is designed to mimic, the functionality of a smartphone so it will be simple for customers to use. Buick IntelliLink® uses a Bluetooth® or USB connection to link to a compatible device, such as a smartphone, cell phone, USB flash drive or portable audio player such as an Apple® iPod®. IntelliLink® in the Envision offers: 1. Text Message Alerts. Requires a compatible smartphone with Bluetooth profile (M.A.P.) and applicable text messaging features. 2. Siri® Eyes Free. Requires Buick IntelliLink® and compatible iPhone® running iOS 6 or later. 3. Gesture recognition. 4. App Tray customization. 5. Customizable Favorites. 6. Natural Language Voice Recognition. 7. Cluster/centerstack integration. 8. 8-inch (203 mm) diagonal multi-color reconfigurable Driver Information Center (DIC) with cluster display. 9. Available Navigation. Map coverage available in the United States and Canada. Bulletin No.: 16-NA-149 August, 2016 Page 9

QuietTuning™ Technologies

4426909 1. ABSORB: These technologies absorb sound. steering, DIC displays, and beeps while the driver 1.1. Engine Compartment Acoustic Absorbers follows text commands, selects the gear and brakes/accelerates. 1.2. Interior Trim Acoustic Absorbers 1.3. High Performance Dissipative Acoustic System (Active Noise Cancellation — RPO NKC) 1.4. Door System Acoustic Absorber 2. Block: These technologies block sound. 2.1. Acoustic Laminated Windshield 2.2. Acoustic Laminated Front Side Glass 2.3. Body Cavity Sealing Baffles 3. Reduce: This technology reduces sound. 3.1. Liquid Apply Sound Deadener Safety — Driving/Parking Assistance Systems

• Adaptive Cruise Control: If equipped, this feature helps to maintain a safe following distance with the vehicle ahead. • Automatic Parking Assist: If equipped, the Automatic Parking Assist (APA) system helps to 4428895 search for and maneuver the vehicle into parallel • With Head-Up Display or perpendicular parking spots using automatic Page 10 August, 2016 Bulletin No.: 16-NA-149

4428915 4428439

Without Head-Up Display • Rear Vision Camera: When the vehicle is shifted Notice: On vehicles equipped with Head-Up into R (Reverse), the Rear Vision Camera (RVC) Display (HUD), the icons display on the windshield. displays an image of the area behind the vehicle On vehicles that are not equipped with HUD, the in the center stack display. A warning triangle may icons display in the center of the IP cluster. display on the RVC screen to show that it has detected an object. This triangle changes from Forward Collision Alert: Forward Collision Alert amber to red and increases in size the closer the (FCA) warnings will not occur unless the FCA object becomes. The previous screen displays system detects a vehicle ahead. When a vehicle is when the vehicle is shifted out of R after a short detected, the vehicle ahead indicator will display delay. green. When your vehicle approaches another detected vehicle too rapidly, the red FCA display • Safety Alert Seat: The Safety Alert Seat provides will flash. Also, eight rapid high-pitched beeps will the driver the option of getting haptic seat-bottom sound from the front, or both sides of the Safety vibration crash avoidance alerts or beeping. To Alert Seat will pulse five times. change from one to the other, see Collision/ Detection Systems under Vehicle Personalization • Front Automatic Braking: If equipped, and a in the Owner Manual. front-end collision is determined to be imminent while following a vehicle ahead, the system can Surround Vision 360-Degree Camera automatically apply the brakes to help reduce the System collision’s severity. • Lane Change Alert with Side Blind Zone Alert: Lane Change Alert (LCA) provides side-mirror alerts to help the driver avoid crashing into a moving vehicle detected in their side blind spot (or zone) or a vehicle that is rapidly approaching their blind spot during a lane change maneuver. • Lane Keep Assist with Lane Departure Warning: Lane Keep Assist (LKA) provides gentle steering wheel turns and Lane Departure Warning (LDW) alerts, if necessary to help drivers avoid crashes due to unintentionally drifting out of their lane when they are not actively steering and their turn signal is not activated. • Rear Cross Traffic Alert: When in reverse, Rear Cross Traffic Alert (RCTA) provides alerts to help the driver avoid crashing into approaching detected left or right cross traffic, for example, when backing out of a crowded parking space or driveway with side obstructions.

4426006 Bulletin No.: 16-NA-149 August, 2016 Page 11

Suspension/Electric Power Steering Surround Vision Notice: The Surround Vision cameras have blind Suspension spots and will not display all objects near the corners of the vehicle. Folding side mirrors that are Front Suspension: Specifically tuned coil springs, out of position will not display the surround view direct-acting stabilizer bar (hollow); hydraulic ride correctly. bushings; HiPer Strut suspension. If equipped, Surround Vision displays an image of the Rear Suspension: Four-link independent rear with area surrounding the vehicle, along with the front or hollow stabilizer bar. rear camera views in the center stack. The front camera Electric Power Steering is in the grille or near the front emblem, the side cameras are on the bottom of the outside rearview Steering consists of an electric rack-and-pinion, power mirrors (1), and the rear camera is above the license assisted with cross-wind stabilization and road-shake plate. stabilization. Traction Control and StabiliTrak®

The vehicle has a Traction Control System (TCS) and StabiliTrak®, an electronic stability control system. These systems help limit wheel slip and assist the driver in maintaining control, especially on slippery road conditions. Both systems come ON automatically when the vehicle is started and begins to move. The systems may be heard or felt while they are operating or while performing diagnostic checks. This is normal and does not mean there is a problem with the vehicle. TCS activates if it senses that any of the drive wheels are spinning or beginning to lose traction. When this happens, TCS applies the brakes to the spinning wheels and reduces engine power to limit wheel spin. StabiliTrak® activates when the vehicle senses a difference between the intended path and the direction the vehicle is actually traveling. StabiliTrak® selectively applies braking pressure to any one of the vehicle wheel brakes to assist the driver in keeping the vehicle 4425458 on the intended path. 1 = Views displayed by the Surround Vision cameras. Indicator Light Operation The indicator light for both systems is in the instrument cluster. This light will: • Flash when TCS is limiting wheel spin. • Flash when StabiliTrak is activated. • Turn ON and stay ON when either system is not working. If cruise control is being used and traction control or StabiliTrak begins to limit wheel spin, the cruise control will disengage. Cruise control may be turned back ON when road conditions allow.

4425561 2 = Area not displayed by the Surround Vision cameras. Page 12 August, 2016 Bulletin No.: 16-NA-149

Transmission — Hydra-Matic™ 6T50 Transmission Gear Ratios 6-Speed Automatic Transaxle — The transmission has the following gear ratios: RPO M2D • First: 4.584 • Second: 2.964 • Third: 1.912 • Fourth: 1.446 • Fifth: 1.000 • Sixth: 0.746 • Reverse: 2.940 • Final Drive Ratio: 3.230 Transmission Fluid Level and Condition Check The transmission uses DEXRON® VI transmission fluid. When performing fluid checks, always refer to SI for the Transmission Fluid Level and Condition Check procedure. Buick Intelligent AWD (Active Twin Clutch)

4424529 Hydra-Matic™ 6T50 6-Speed Automatic Transaxle Shown is a typical view of the Hydra-Matic™ 6T50 6-speed front-wheel-drive, electronically controlled, automatic overdrive transaxle with an electronically controlled torque converter clutch and a surge accumulator for the start/stop system. This transmission features Gen 3 upgrades implemented to enhance efficiency. The pump has been moved off-axis, which allows better sealing of the torque converter, reducing pump flow demands and enhancing fuel economy. Additionally, the pump is now a binary vane-type, which allows lower power consumption during times of lower flow demands and at higher engine speeds. 4424641 • The transmission case material is made from die Notice: When using a compact spare tire on an cast aluminum. AWD vehicle, the system automatically detects the compact spare and reduces AWD performance to • Clutch-to-clutch shift operation. protect the system An AWD message may be • Adaptive shift controls. displayed. To restore full AWD operation and • IX Gear Pump. prevent excessive wear on the system, replace the compact spare with a full-size tire as soon as • Ground and honed gears. possible. • Stop/start technology supported by a unique oil storage accumulator. Buick Intelligent AWD (Active Twin Clutch) delivers greater handling, stability and driver confidence by Torque Converter preemptively and electronically splitting torque between The 3-element torque converter contains a pump, a the rear wheels to provide additional control versus a turbine, a stator assembly and a pressure plate splined 50/50 split in a single clutch system. to the turbine. The torque converter acts as a fluid It provides: coupling to smoothly transmit power from the engine to • Enhanced traction, stability and performance the transmission. It also hydraulically provides during vehicle acceleration and cornering during additional torque multiplication when required. The dry normal conditions. pressure plate, when applied, provides a mechanical • Optimal handling and improved traction in wet/ direct drive coupling of the engine to the transmission. snowy/icy conditions. Bulletin No.: 16-NA-149 August, 2016 Page 13

• Improved vehicle response when road traction is Vehicle Lifting and Jacking not uniform, such as when the right side of the vehicle is on ice and the left side is on dry pavement. Note: The use of a LOW PROFILE LIFT ARMS SYSTEM may be required to avoid unwanted • Active Twin Clutch with active torque bias has increased capability to add stability across all contact with the vehicle's body and structure driving conditions. depending on lifting equipment used. Refer to the manufacture's recommendation for their • A fuel economy benefit is realized by not pushing applications of low profile lift arms system for their torque when it is not needed. lifting equipment. Towing the Vehicle — Recreational Vehicle Lifting - Frame Contact Lift Vehicle Towing

Towing the Vehicle DO NOT use a wheel lift tow truck to tow the vehicle. DO NOT dolly tow the vehicle. Only use a flatbed car carrier. Do not lash or hook to suspension components. Use the proper straps around the tires to secure the vehicle. Recreational Vehicle Towing — Dinghy Towing Recreational vehicle towing means towing the vehicle behind another vehicle, such as behind a motor home. Dinghy towing is towing the vehicle with all four wheels on the ground. To dinghy tow the vehicle from the front, with all four wheels on the ground, perform the following: Notice: Use of a shield mounted in front of the vehicle grille could restrict airflow and cause damage to the transmission. 1. Position the vehicle to tow and then secure it to the

towing vehicle. 4424064 2. Turn the ignition ON, and shift the transmission to • Front Lift Pads: When lifting the vehicle with a N (Neutral). frame-contact lift, place the front lift pads on the 3. With the transmission in N (Neutral), turn the rocker outer panel weld flange, as shown. ignition OFF. • Rear Lift Pads: When lifting the vehicle with a 4. To prevent the battery from draining while the frame-contact lift, place the rear lift pads on the vehicle is being towed, remove fuses 29 and 32 rocker outer panel weld flange, as shown. (Body Control Module) from the instrument panel fuse block. Reinstall the fuses upon reaching the Vehicle Jacking destination. When using a service jack under the front or rear of the The instrument panel fuse block is in the glove vehicle, use the same location that is shown for the box. To access the fuses, open the fuse panel door front and rear lift pads. from the passenger side by pulling it out. To reinstall the door, insert the tabs on the top of the door first, then push the door back into its original location. Front and Rear Tow Eye The tow eye should not be used to recover a vehicle from an off-road situation. The tow eye is stored in the spare tire compartment area. To use the tow eye: 1. Carefully open the cover by using the small notch that conceals the front or rear tow eye socket. 2. Install the tow eye into the socket by turning it clockwise until it stops in a horizontal position. When the tow eye is removed, reinstall the cover with the notch in the original position. Page 14 August, 2016 Bulletin No.: 16-NA-149

Special Tools

The following new tools were released for the 2016 Envision:

Special Tools — Tool Number and Description Tool Number Description DT-50087 Remover/Installer, Differential Bearing, 4 Pinion DT-51329-A Driveshaft Remover DT-51466 Seal Installer, LH Input and IDS DT-51467-A Seal Installer, L Cover and Pinion

Training Courses

The majority of the systems found on this vehicle are taught in GM’s core curriculum from a conceptual theory and operation perspective. The North American technical training core curriculum structure is system based. To access all of the available training courses in the United States, visit the following website: www.centerlearning.com In Canada, Go to > GM GlobalConnect and select Centre of Learning

Training Course Name or System — Course Number and Description Course Name or System Course Number and Description New Model Feature #10316.81W 2016 Buick Envision New Model Feature (U.S. & 2016 Buick Envision New Model Feature Canada) #16440.17D VCT and #16440.17D-V Video — Engines: New Engine and Updates for RPO LCV, LTG and LL0 (U.S. only) 2.0L Turbocharged — RPO LTG #16043.16H — Ecotec Gen. 2 Overhaul & Repair Certification (Canada only) Engine - 12V Starting and Charging #16040.31W — 12V Stop / Start #17041.52V 6-Speed Auto Video — Video On Demand (VOD) (U.S. only) #17036.01V — 6T40/45 Unit Repair Video (Canada only) Transmission #17041.56W1-W3 Automatic Transmission Operation, Hydra-Matic™ 6T50 6-Speed Automatic Transaxle — Diagnosis and Service 1-3 WBT (U.S. & Canada) RPO M2D #17041.56H Automatic Transmission Operation, Diagnosis and Service ILT (U.S. only) #17041.65H-R2 6-Speed Automatic Transmission Mechanical Service ILT (U.S. only) Safety Systems Forward Collision Alert / Lane Departure #22048.42W1-W3 GM Safety Systems 1-3 (U.S. & Canada) Warning and Rear Vision Camera

Version Information

Version 2 Modified July 20, 2016 – Changes made to create 16-NA-149 Version 2: Add a Section for: Engine — Stop/Start System — RPO KL9, with a graphic and system operation information. Remove the Attention statement and replace that information with a Table for: Region — Countries — United States and Canada Bulletin No.: 16-NA-149 August, 2016 Page 15

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GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper WE SUPPORT VOLUNTARY service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your TECHNICIAN vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the CERTIFICATION information.